Shukla, A and Bhat, SD and Vijayamohanan, Pillai K (2016) Simultaneous unzippingandsulfonationofmulti-walledcarbon nanotubestosulfonatedgraphenenanoribbonsfornanocomposite membranesinpolymerelectrolytefuelcells. Journal of MembraneScience, 520. pp. 657-670. ISSN 0376-7388

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Abstract

Simultaneous insituunzippingandsulfonationofmulti-walledcarbonnanotubes(MWCNTs)using potassium sulfate(K2SO4) andsodiumdodecylbenzenesulfonate(SDBS)byahydrothermalsynthetic routeiscarriedouttopreparesulfonatedgraphenenanoribbons(sGNR)asconfirmed byvariouschar- acterization techniques.Further,nanocompositepolymerelectrolytemembranesofthiswithsulfonated polyetheretherketone(SPEEK)showenhancedionexchangecapacity(IEC),protonconductivityand wateruptakecomparedtothatofpristineSPEEKmembrane.Highermechanicalstabilityforthese composite membranesisobservedincomparisonwithpristineSPEEKmembrane.Interestingly,these SPEEK/sGNR compositeelectrolytemembranes(0.1wt%sGNR)whiletestinginaprotonexchange membrane fuelcell(PEMFCs)test-bed,showsacurrentdensityof840mAcm�2 at 0.6V(peakpower density of660mWcm�2) comparedtothecurrentdensityof480mAcm�2 at 0.6V(peakpowerdensity of 331mWcm�2) forpristineSPEEK.Theaccelerateddurabilitytestforthemembranesconfirms that composite membranesofSPEEK/sGNRarehighlydurableevenafter200hwithmarginaldropinOCV with negligiblefuelcross-overupto175htosuggestitspotentialapplicationsinslewoffuturetech- nologies includingpolymerelectrolytefuelcells,waterelectrolyzersandelectrochemicalsensors

Item Type:	Article
Uncontrolled Keywords:	Multi-walledcarbonnanotubes;Sulfonated graphenenanoribbons; Nanocompositemembrane; Proton exchange membrane fuel cells
Subjects:	Electrodics and Electrocatalysis Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	Dr. N Meyyappan
Date Deposited:	07 Aug 2017 07:08
Last Modified:	07 Aug 2017 07:08
URI:	http://cecri.csircentral.net/id/eprint/3168

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